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From: John Woodgate
Subject: Re: Electronic water faucet: How / what they use ?
Date: Fri, 20 Dec 2002 07:12:59 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Fri, 20 Dec 2002 08:30:39 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that dsp1024 wrote
(in ) about 'Electronic
water faucet: How / what they use ?', on Fri, 20 Dec 2002:
>"John Woodgate" wrote in message
>> I read in sci.electronics.design that dsp1024 wrote
>> (in ) about 'Electronic
>> water faucet: How / what they use ?', on Thu, 19 Dec 2002:
>> >I've seen several public places with electronic water faucets. What type
>> >valve do they use ? Is it on/off solenoid or some type of stepper motor ?
>> Solenoid valves; there's no need for motorized valves.
>PWM to control the amout of flow ?
If you need to control the flow rate, then you need motorized valves.
But the units in public places use preset mechanical valves to set the
PWM on a solenoid valve would create a 'water organ' - incredibly loud
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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